For that same reason bra sizes have sister sizes these cup sizes may appear to be different but the cup volume will actually be the same because the band size is different.
Example 32d cup size.
The importance of sister sizing.
People are often confused because they think is b cup is the same on any band size whether it s a 32b or a 44b for example but actually the letter is in relation to the band.
The only difference is the band size.
During the bra manufacturing process the same exact bra cup may be paired with different band lengths to create multiple bra sizes.
Knowing your sister size can be helpful when adjusting your.
An easy way to determine your true cup size is simply to locate your bra size on the chart below and see which cup letter is paired with a 34 band in your row.
But are wider so hold more volume overall.
If there are two women one wearing a 34c and other wearing a 32d then the volume of the breast tissues if measured would.
One actual size smaller than your current band size and one letter name larger than your current cup.
For example if your bra size is 34c you have the option to try either a size 32d or a size 36b.
For example the same exact cup is used to make 38a 36b 34c 32d and 32dd bras.
They d be too big for you so to wear a 34 band you d need a smaller cup size a 34c.
For example if you wear a 34c your sister size down would be 32d.
The cup can take the same volume of breast tissues but the band size is different.
You may refer to the chart below and use it as a guide to help you identify your appropriate sister sizes.
Imagine you re a 32d.
A d cup on a 32 band means your underbust is around 32 and your bust is around 36 does that sound.
A 34d has cups that stick out the same distance.
For example a 32d has the same cup volume as a 34c or a 36b or a 38a.
We re here to help.
These are the so called sister sizes.
If you wear a 32d you are actually a true c cup.
The cup size means nothing without knowing the band size.
So a 36b has the same cup size as a 34c and the 32d.
That s why one person s d cup size can end up being the same overall size as someone else s b cup size.
In doing so the number of your band size and the letter of your cup size shifts by one size.